unsigned long getLength(const RVNGInputStreamPtr &input)
{
checkStream(input);
const long begin = input->tell();
if (0 > begin)
throw SeekFailedException();
long end = begin;
if (0 == input->seek(0, librevenge::RVNG_SEEK_END))
end = input->tell();
else
{
// RVNG_SEEK_END does not work. Use the harder way.
while (!input->isEnd())
{
readU8(input);
++end;
}
}
seek(input, begin);
assert(begin <= end);
return static_cast<unsigned long>(end - begin);
}
bool LotusParser::readZones()
{
RVNGInputStreamPtr input = getInput();
// reset data
m_styleManager->cleanState();
m_graphParser->cleanState();
m_spreadsheetParser->cleanState();
input->seek(0, librevenge::RVNG_SEEK_SET);
bool mainDataRead=false;
// data, format and ?
for (int wh=0; wh<2; ++wh)
{
if (input->isEnd())
break;
while (readZone()) ;
//
// look for ending
//
long pos = input->tell();
if (!checkFilePosition(pos+4))
break;
int type = (int) libwps::readU16(input); // 1
int length = (int) libwps::readU16(input);
if (type==1 && length==0)
{
ascii().addPos(pos);
ascii().addNote("Entries(EOF)");
if (!mainDataRead)
mainDataRead=m_state->m_inMainContentBlock;
// end of block, look for other blocks
continue;
}
input->seek(pos, librevenge::RVNG_SEEK_SET);
break;
}
while (!input->isEnd())
{
long pos=input->tell();
int id = (int) libwps::readU8(input);
int type = (int) libwps::readU8(input);
long sz = (long) libwps::readU16(input);
if ((type>0x2a) || sz<0 || !checkFilePosition(pos+4+sz))
{
input->seek(pos, librevenge::RVNG_SEEK_SET);
break;
}
libwps::DebugStream f;
f << "Entries(UnknZon" << std::hex << id << "):";
ascii().addPos(pos);
ascii().addNote(f.str().c_str());
input->seek(pos+4+sz, librevenge::RVNG_SEEK_SET);
}
if (!input->isEnd())
{
ascii().addPos(input->tell());
ascii().addNote("Entries(Unknown)");
}
return mainDataRead || m_spreadsheetParser->hasSomeSpreadsheetData();
}